Fat-extraction apparatus.



H. L.'- WALTER 8: G. E. GOODRIGH. FAT EXTRACTION APPARATUS.

APPL10ATION P ILED JUNE 21', 1911.

1,010,991. 1 Pafiefited Dec.5, 1911.

niTED STATES PATENT OFFICE.

- HENRY L. WALTER AND cnAizLEs 1:. eoonarcn, or wasnme'ron, ms'riuor or COLUMBIA.

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Patented be... 5, 1911.

nnnicunn r0 rm: PUBLIC.)

To all whom it may concern:

Beflitknown that we, IIENRY L. WALTER and (Julianne E. Gooomcn, citizens of the United States, residing in the city of Washington, District of Columbia, and employees of the Department of Agrlculture of the United States of America, (whose post-ofiice addresses are Washington, District of Columbia,) have invented a new and useful Improvement in Fat-Extraction Apparatus. This application is made under the act of March 3, 1883, chapter 143 (22 Stat, 625), and the invention herein described and claimed may be used by the Government of the United States or any ofits ofiicers or employees in the prosecution of work for the United States, or by any person in the United States, without the payment of any royalty thereon.-

This invention relates to apparatus for use in the determination of fats (ether extract) and similar processes.

In the accompanying drawings Figure 1 shows a modified form of flask. Fig. 2 shows a simple form of extraction tube, provided :with a readily removable perforated plate for supporting the material being treated. Fig. 3-is a form of spring for use in connection with the same, being shown in perspective. Fig. 4 shows the extraction tube ready for use in a determination. Fig. 5 shows the complete device, the parts separated to avoid confusion.

The flask shown in Figs. 1 and '5 differs from the ordinary Knorrs fat flask, for mercury seal, in that it is provided with one or more holes, 1, for allowing the passage of vapors outwardly and to allow any other condensed in the tube, 2, surrounding the extraction tube to flow backinto the flask. These holes may be 3; inch in diameter and about 1 inch above the level of the mercury trough, 3. n 1

Referring to Fig. 2, the extraction tube, 4, is of simple construction and the lower tapered end is allowed to enter the neck of the fat bottle, the shoulder, 5, setting on the top of said neck. It is immaterial if it forms an almost tight oint, since the vapors from the flask can pass outwardly through the holes, 1, above referred to. In this tube, resting on the shoulder, is placed a disk, 6, made of any suitable-substance. Nickel may be used in 'terial, 9, is placed thereon.

The spring illustrated in Fig. 3 may be made of spring brass wire, in case brass is not acted on by the solvent used. resilient wire maybe used. This may be made of No. 19 wire and comprises an inwardly' curved portion, 10, a portion triangular, circular, or other portion, 1], lying in a plane at right angles to the part, 10, a single coil, 12, at the top, an end portion, 13, the extreme end of which is bent slightly inwardly illustrated at 14.

The apparatus is used as follows: The disk, 6, is placed in position as shown and a thin layer, asbestos or similar fibrous ma- The weighed sample of material being analyzed (shown at 15), is placed thereon, and a disk of platinum, nickel, or other material, 16, is placed thereon and the end of the spring inserted in the tube by pressing the parts 10 and 13 together and sliding it down into the tube as shown in Fig. 4. The function of the disk, 16, as will be observed, is to prevent floating or pufiing up of the material being extracted, due to air contained therein or to the vaporization of the solvent, which sometimes is liable to occur, particularly with light and flufiy materials. Ether, or other solvent to be employed, is then placed An y other in the weighed flask, and the tube, 4, placed in position, and the condenser lowered into place, mercury being placed in the trough,

if desired from the tube, 4, (after drying to remove the ether), by means of a small hook of wire, or bent glass rod, or shoe buttoner. A small glass tube is then inserted.

at the bottom end of the tube, 8, and by gently pressing upwardly the plate, 6, as

bestos layer, 9, sample, 15, and plate, 16, are removed, after which the sample'can easily be separated, by washing, if necessary, for the determination ofcrude fiber in the ordinary manner.

The device is easy to manipulate, cheap in construction, and not liable to breakage.

Having thus described'our invention, we claim as follows:

1. An apparatus for extraction, comprising a Knorr fat flask provided with a hole above the normal mercury level, an extraction tube, a disk capable of being placed in said extraction tube for supporting the material to be extracted, a disk-to prevent rising, floating, or pufiing up of thematerial, and a spring adapted to hold the same in place, substantially as described.

2. An apparatus for extraction, compris-- ing a fiaskprovided with a mercury trough,

a plurality of holes in the neck located substantially above the level of the outer edge of said trough, an extraction tube having a cylindrical portion, shoulder therebelow, an extension below this shoulder, a periorated disk capable of resting on said shoulder, provided with a wire' extending downwardly into said extension, a layer of filtering material on said disk for supporting the material to be extracted, a disk adapted to be placed on said material, a spring adapted to be placed innsaid extraction tube to hold said last named disk in place, substantially as described.

In testimony whereof We afiix our signatures in the presence of two subscribed Wit- GEO. L. BIDWELL, GEO. P. WALTON. 

